Refactor valuation models tab

1 files changed, 48 insertions, 1 deletions

diff --git a/services/valuation_service.py b/services/valuation_service.py
index 8559842..357c679 100644
--- a/services/valuation_service.py
+++ b/services/valuation_service.py
@@ -1,4 +1,4 @@
-"""Valuation engines for DCF and EV/EBITDA."""
+"""Valuation engines for DCF, EV/EBITDA, EV/Revenue, and simple multiple-based models."""
 import numpy as np
 import pandas as pd
 
@@ -158,3 +158,50 @@ def run_ev_ebitda(
         "implied_price_per_share": equity_value / shares_outstanding,
         "target_multiple_used": target_multiple,
     }
+
+
+def run_ev_revenue(
+    revenue: float,
+    total_debt: float,
+    total_cash: float,
+    shares_outstanding: float,
+    target_multiple: float,
+) -> dict:
+    """Derive implied equity value per share from an EV/Revenue multiple."""
+    if not revenue or revenue <= 0:
+        return {}
+    if not shares_outstanding or shares_outstanding <= 0:
+        return {}
+    if not target_multiple or target_multiple <= 0:
+        return {}
+
+    implied_ev = revenue * target_multiple
+    net_debt = (total_debt or 0.0) - (total_cash or 0.0)
+    equity_value = implied_ev - net_debt
+
+    return {
+        "implied_ev": implied_ev,
+        "net_debt": net_debt,
+        "equity_value": equity_value,
+        "implied_price_per_share": equity_value / shares_outstanding,
+        "target_multiple_used": target_multiple,
+        "revenue_used": revenue,
+    }
+
+
+def run_price_to_book(
+    book_value_per_share: float,
+    target_multiple: float,
+) -> dict:
+    """Derive implied equity value per share from a P/B multiple."""
+    if not book_value_per_share or book_value_per_share <= 0:
+        return {}
+    if not target_multiple or target_multiple <= 0:
+        return {}
+
+    implied_price = float(book_value_per_share) * float(target_multiple)
+    return {
+        "implied_price_per_share": implied_price,
+        "target_multiple_used": float(target_multiple),
+        "book_value_per_share": float(book_value_per_share),
+    }